<!DOCTYPE html><head><meta charset="utf-8"><title>Canvas test</title></head><body><div class="container"><div class="row"><img id="img" src="./img/image.png"><canvas id="canvas1" width="400" height="400"></canvas><canvas id="canvas2" width="400" height="400"></canvas><canvas id="canvas3" width="400" height="400"></canvas><canvas id="canvas4" width="400" height="400"></canvas></div></div><script type="application/javascript" src="js/app.js"></script></body>